Clubiona yaoi, Yu & Li, 2019

Yu, Hao & Li, Shuqiang, 2019, Eight new species of the genus Clubiona Latreille, 1804 from Xishuangbanna Rainforest, southwestern China (Araneae, Clubionidae), Zootaxa 4545 (2), pp. 151-178 : 152-153

Clubiona yaoi sp. nov.

Figs 1–2

Type material. Holotype: 6 (IZCAS Ar 34498), CHINA: Yunnan: Xishuangbanna, Mengla County, Menglun Town , Menglun Nature Reserve , G 213 roadside, Secondary forest (N21°54.459', E101°16.755', 644 m), 20 November 2009, leg. G. Tang and Z.Y. Yao (Tang-Yao_No.14). Paratypes: 14♂, 11♀ ( IZCAS Ar 34499–34523), same data as holotype .

Etymology. The specific name is a patronym after Zhiyuan Yao, collector of several specimens examined in this study; name in genitive case.

Diagnosis. Males of Clubiona yaoi sp. nov. can be easily distinguished from those of all other species of the C. apiculata group by the small, papilliform dorsal cymbial apophysis ( Fig. 1A ) and by the distally forked, proximally broad, blade-shaped retrolateral tibial apophysis ( Fig. 1B ). The females appears to be closely related to C. apiculata Dankittipakul & Singtripop, 2014 ( Dankittipakul & Singtripop 2014: figs 1D, 3F–G), C. conica Dankittipakul & Singtripop, 2014 ( Dankittipakul & Singtripop 2014: figs 2A–C, 4D–E) in having similar globular spermathecae situated anteriorly, and the ascending copulatory ducts, but can be recognized by the more or less elongate-oval bursae, and by the copulatory openings situated basolaterally. ( Figs 2 A–D).

Description. Male (holotype): Total length 2.22; prosoma 0.96 long, 0.64 wide; opisthosoma 1.11 long, 0.62 wide. Prosoma ( Figs 2 E–F), oval, pars cephalica slightly narrowed, widest between coxae II and III, in profile slightly higher just behind longitudinal fovea, gradually sloping towards pars cephalica; integument smooth, clothed with numerous short fine hairs. Carapace yellowish-orange, without distinct color pattern; fovea reddish. Chelicerae protruding and coloured as carapace, with four promarginal and three retromarginal teeth. Labium and endites yellowish-orange, longer than wide. Sternum yellowish. Eyes: AER slightly recurved, PER wider than AER and slightly procurved in dorsal view. AME dark, other eyes light; with black rings. Eye sizes and interdistances: AME 0.05, ALE 0.04, PME 0.06, PLE 0.05, AME–AME 0.06, AME–ALE 0.03, PME–PME 0.12, PME–PLE 0.03, MOQL 0.15, MOQA 0.15, MOQP 0.23. Legs yellowish, without distinct color markings. Leg formula: IV, I, III, II; leg measurements: I 1.75 (0.50, 0.25, 0.49, 0.30, 0.22), II 1.45 (0.47, 0.21, 0.27, 0.34, 0.15), III 1.49 (0.43, 0.23, 0.38, 0.27, 0.19), IV 2.19 (0.67, 0.24, 0.49, 0.57, 0.22). Opisthosoma ( Figs 2 E–F) elongateoval, dorsally yellowish-white with a lengthwise light orange heart mark, reaching posterior half; with a pairs of muscular depressions located at distal part of heart mark; with conspicuous anterior hair tufts; venter and spinnerets light yellow. Palp ( Figs 1 A–E): Tibia short, with three apophyses, PTA with a bulky base and a thumb-shaped tip; VTA distinctly elevated, coniform in ventral view and digitiform in prolateral view; RTA broad and flat, heavily sclerotized, distally bifurcate in retrolateral view, its two tips sharp and teeth-shaped; cymbium, dorsally with a papilliform cymbial apophysis; genital bulb elongated and with a relatively flat tegulum, sperm duct distinct, Ushaped; embolus, a small spicule, originating from apical, prolateral side of tegulum, tip extending to apex of cymbium; conductor digitiform, translucent, originating on apical, retrolateral area of tegulum.

Female (paratype IZCAS Ar 34499): Total length 3.64; prosoma 1.42 long, 1.02 wide; opisthosoma 2.19 long, 1.32 wide. Not strikingly different from males but without distinct heart mark and muscular depressions ( Figs 2 G– H). Eye sizes and interdistances: AME 0.05, ALE 0.05, PME 0.08, PLE 0.06, AME–AME 0.05, AME–ALE 0.03, PME–PME 0.21, PME–PLE 0.03, MOQL 0.17, MOQA 0.19, MOQP 0.37. Legs yellowish, without distinct color markings. Leg formula: IV, II, I, III; leg measurements: I 1.96 (0.59, 0.29, 0.38, 0.46, 0.24), II 2.01 (0.56, 0.32, 0.49, 0.40, 0.24), III 1.64 (0.53, 0.20, 0.41, 0.35, 0.16), IV 2.95 (0.93, 0.33, 0.67, 0.72, 0.30). Epigyne ( Figs 2 A– D): Epigynal plate longer than wide, posterior margin not rebordered; atrium absent; spermathecae and copulatory ducts prominently visible through epigynal plate in ventral view; two small copulatory openings, located at postero-lateral portion of epigynal plate; dark copulatory ducts ascending anteriorly, connect with globular spermathecae; bursae oblong, translucent, surface wrinkled and ribbed, connected to copulatory ducts at midlength between copulatory openings and spermathecae; fertilization ducts acicular, membranous, located on dorsal-lateral surface of spermathecae.

Distribution. Presently known only from the type locality.

Figures

FIGURE 1. Clubiona yaoi sp. nov., male holotype: A–B, left palp (A prolateral view; B retrolateral view); C–E, flipped right palpal bulb (C prolateral view; D ventral view; E retrolateral view). Abbreviatures: C, conductor; DCA, dorsal cymbial apophysis; E, embolus; EB, embolic base; PTA, prolateral tibial apophysis; RTA, retrolateral tibial apophysis; VTA, ventral tibial apophysis. Scale bars: 0.10 mm (A–B, C–E in the same scale).

FIGURE 2. Clubiona yaoi sp. nov., male holotype (E–F) and female paratype (A–D, G–H): A–B, epigyne, ventral view (A uncleared; B cleared); C–D, vulva, dorsal view (C cleared; D cleared and embedded in Arabic gum); E–H, habitus (E, G dorsal view; F lateral view; H ventral view). Abbreviatures: BS, bursa; CD, copulatory duct; CO, copulatory opening; FD, fertilization duct; SP, spermatheca. Scale bars: 0.10 mm (A–D in the same scale); 1 mm (E–F, G–H in the same scale).